a{
    text-decoration: none;
}
.main-box{
    width: 1170px;
    margin:auto;
    color: #aaaaaa;
    font-size: 12px;
    overflow: hidden;
}
.flex{
    display: flex;
}

.flex-center{
    justify-content: center;
}
.flex-around{
    justify-content: space-around;
}
.flex-between{
    justify-content: space-between;
}
.flex-wrap{
    flex-wrap: wrap;
}
.flex-top{
    align-items: flex-start;
}
.flex-bottom{
    align-items: flex-end;
}
.margin10{
    margin: 10px;
}
.padding10{
    padding: 10px;
}
.padding-top10{
    padding-top: 10px;
}
.padding-right10{
    padding-right: 10px;
}
.padding-bottom10{
    padding-bottom: 10px;
}
.padding-left10{
    padding-left: 10px;
}
.margin-top10{
    margin-top: 10px;
}
.margin-right10{
    margin-right: 10px;
}
.margin-bottom10{
    margin-bottom: 10px;
}
.margin-left10{
    margin-left: 10px;
}
.fl{
    float: left;
}
.fr{
    float:right;
}